AutoCAD Inventor :: Getting Data Correctly From Excel Sheet

I´m having a couple of problems with getting data correctly from an Excel Sheet. I´m using the Excel Sheet to get Data for the Stock Number based on geometry.

First time the Excel File get´s opened it always cannot find the first sheet. I´m using a german Version and Sheet1 is Tabelle1 in german.

It always searches for sheet1 the first time the script runs on a new derived assembly. The second time (on second part) it correctly finds Tabelle1 and reads the correct value.Here is the code I´m using:

[code]

myXLS = "K:IdentNr.xls"
GoExcel.Open(myXLS)
i = GoExcel.FindRow(myXLS, "Tabelle1", "Stärke", "=", Stärke, "Material", "=", iProperties.Material)
IdentNr = GoExcel.CurrentRowValue("IdentNr")
iProperties.Value("Custom", "IdentNr") = IdentNr

[code]

And there is another issue which I have solved already but still gives me a bit of a headache. When the userdefined property IdentNr gets written into the part it always defaults to a numerical value, which means that I always get a comma at the end of the Stock Number.

Only when I define IdentNr like this:

Dim IdentNr As String

the format is correctly set to Text.I expected that when you read a value from an Excel Cell that the Format of the Cell gives the format of the user defined property. Is that not correct?